Clear the switchDpidEvents after all events are processed.
diff --git a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java
index 5c095d5..7118e41 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowEventHandler.java
@@ -326,6 +326,7 @@
 	    // Cleanup
 	    topologyEvents.clear();
 	    flowIdEvents.clear();
+	    switchDpidEvents.clear();
 	    //
 	    // NOTE: Keep a cache with my Flow Paths
 	    // allFlowPaths.clear();